This plugin gives you the ability to run the site in a language (Arabic for example) and use the admin panel in another (like English).
Just go to Settings » General and choose your language.
- Download the plugin, unzip it and upload it to
/wp-content/plugins/directory. - Activate the plugin through the ‘Plugins’ menu in WordPress.
- Go to Settings » General and choose your language.
http://wordpress.org/extend/plugins/admin-locale/installation